What welding processes are used in manufacturing Inconel 725 Welded Pipes?

Inconel 725 Welded Pipes are produced using EFW (Electric Fusion Welding) for larger diameters and thicker wall pipes, and ERW (Electric Resistance Welding) for thinner wall pipes and moderate pressure systems. Post Weld Heat Treatment (PWHT) is applied to enhance mechanical strength and corrosion resistance.

What is the size range of Inconel 725 Welded Pipes?

Inconel 725 Welded Pipes are available in sizes from 6 inch NB to 48 inch NB with wall thickness from SCH 5 to SCH XXS. Lengths are available up to 12 meters with custom lengths on request, manufactured as per ASTM B705 / ASME SB705 standards.

What are the key advantages of Inconel 725 Welded Pipes over seamless pipes?

Inconel 725 Welded Pipes are cost-efficient compared to seamless pipes, available in larger diameters, have a faster production cycle, offer easier customization for fabrication, are suitable for structural and moderate pressure systems, and have good resistance to sour service environments.

What are the applications of Inconel 725 Welded Pipes?

Inconel 725 Welded Pipes (UNS N07725) are widely used in structural piping systems, chemical processing plants, heat exchanger systems, offshore structural frameworks, refinery piping, moderate pressure pipelines, and oil and gas fabrication systems.

Inconel 725 Welded Pipes Supplier | UNS N07725 EFW & ERW Pipes

Inconel 725 Welded Pipes

Inconel 725 Welded Pipes is a type of nickel-chromium-molybdenum alloy pipes that are formed and welded into pipes using UNS N07725 material. These pipes offer an economical substitute to the seamless pipes and yet they have high corrosion resistance, strength and fabrication properties. UNS N07725 is a stress-resistance corrosive-hardenable alloy that has been used in resistant environments against stress corrosion cracking, pitting, and crevice corrosion.

The Inconel 725 Welded pipes are also mainly used in large diameter piping systems, metal structure, fabrication work, moderate pressure service, cost-efficient industrial installations.

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Inconel 725 Welded Pipe Specifications

Specification Type	Details
Material Grade	Inconel 725
UNS Number	UNS N07725
Werkstoff No.	2.4856
Pipe Type	Welded
Manufacturing Standard	ASTM B705 / ASME SB705
Welding Process	EFW / ERW
Size Range	6” NB to 48” NB
Wall Thickness	SCH 5 – SCH XXS
Form	Round
End Finish	Plain End / Beveled End
Surface Finish	Annealed & Pickled / Polished
Certification	EN 10204 3.1 / 3.2
NACE Compliance	Available on request (MR0175)

Chemical Composition of UNS N07725

Element	Typical Content (%)
Nickel (Ni)	55.0–59.0
Chromium (Cr)	19.0–22.5
Molybdenum (Mo)	7.0–9.5
Niobium (Nb)	2.75–4.0
Iron (Fe)	Balance
Titanium (Ti)	1.0–1.7
Carbon (C)	0.03 max

For complete alloy details, refer to the Inconel 725 Pipes page.

Mechanical Properties of Inconel 725 Welded Pipes (Age Hardened Condition)

Property	Value
Tensile Strength	827–1034 MPa
Yield Strength	414–827 MPa
Elongation	20–35%
Hardness	Up to 40 HRC

Mechanical properties may vary depending on heat treatment condition, welding procedure, and pipe dimensions.

Size Range of Inconel 725 Welded Pipes

Parameter	Range
Outside Diameter	6” NB to 48” NB
Wall Thickness	SCH 5 – SCH XXS
Length	Up to 12 meters (Custom lengths available)
Standard	ASTM B705 / ASME SB705

Large diameters are easier and more economical to produce in welded form, making Inconel 725 Welded Pipes suitable for structural and heavy-duty fabrication applications.

Testing & Inspection

All Inconel 725 Welded Pipes undergo stringent quality checks, including:

Radiographic Testing (RT)
Ultrasonic Testing (UT)
Hydrostatic Testing
Positive Material Identification (PMI)
Weld Inspection & Visual Examination
Mechanical Testing (Tensile, Hardness, Bend)

Mill Test Certificates are supplied as per EN 10204 3.1 / 3.2 standards. Third-party inspection is available upon request.

Manufacturing Process (EFW / ERW) of Inconel 725 Welded Pipes

Inconel 725 Welded Pipes are produced using advanced welding techniques:

EFW (Electric Fusion Welding)
Used for larger diameters and thicker wall pipes. Ensures deep weld penetration and structural integrity for heavy-duty applications.

ERW (Electric Resistance Welding)
Suitable for thinner wall pipes and moderate pressure systems. Provides dimensional accuracy and cost efficiency.

Post Weld Heat Treatment (PWHT)
Controlled heat treatment enhances mechanical strength, improves corrosion resistance, and reduces residual stresses in the weld zone.

Key Advantages of Inconel 725 Welded Pipe

Cost-efficient compared to seamless pipes
Available in larger diameters
Faster production cycle
Easier customization for fabrication
Suitable for structural and moderate pressure systems
Good resistance to sour service environments

Applications of Inconel 725 Welded Pipes

Inconel 725 Welded Pipes (UNS N07725) are widely used in:

Structural piping systems
Chemical processing plants
Heat exchanger systems
Offshore structural frameworks
Refinery piping
Moderate pressure pipelines
Oil & gas fabrication systems

These welded pipes are ideal where cost efficiency, corrosion resistance, and larger diameter availability are primary project requirements.

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